The Elliot 24-inch telescope is located in the large white offset dome near the parking lot. It was installed in 2017.
| Mount | Bisque Taurus 600 equatorial fork mount |
|---|---|
| Pointing Accuracy | 13.4 arcseconds RMS |
| Max exposure | Unguided 5-10 minutes, Guided 60+ minutes |
| Telescope | Planewave 24-inch CDK f/6.5 |
| Focal length | F=3962mm |
| Instrument Port #1 | FLI PL16803 CCD - 9um px - 4096x4096 pixels / Filters=Clear, g', r', i', z', u', R |
| Instrument Port #2 | 55 mm TeleVue Plossl eyepiece or 25mm eyepiece |
| Instrument Port #3 | Lhires III spectrograph - Neon calibration lamp - gratings=150g/mm, 300, 600, 1200 and 2400 - QSI 683 CCD. Slit camera (ZWO 485) FOV ~5'. |
| Instrument Port #4 | Andor Ixon 888 frame transfer CCD, 13um px, 1024x1024px, 11.5' FOV |
| Autoguider | Off-axis, ZWO ASI290MM Mini camera on Celestron 80mm f/11.4 refractor |
The Lhires III PF0001 spectrograph is made by Shelyak Instruments. Specifications given below are accurate for the PF0001.
| Spectrograph Specs | slit width in arc seconds=1.35" | slit width at focal plain=29um +/-1um | |||
|---|---|---|---|---|---|
| Grating | 150 | 300 | 600 | 1200 | 2400 |
| Spectral domain or FOV in Å | 2300 | 1140 | 550 | 250 | 85 |
| Power of resolution | 700 | 1400 | 2800 | 5900 | 175342 |
| Limiting magnitude S/N=100 | 11 | 10.4 | 7 | 6.3 | 5 |
| Dispersion (Å/pix) @ Halpha | 3 | 1.4937 | 0.7 | 0.3 | 0.1 |
| Dispersion (km/s) | 150 | 75 | 35 | 17 | 5 |
| 0-order line | ~1.5mm | 1mm | ~2mm | 1.2mm | |
| Micrometer cheat sheet | |||||
| User verified positions | 6450 @ 3.500mm | ~6563Å @ ~17.7mm |
| Background | The 24-in telescope at Wallace is an Ealing "24-in Research Cassegrain Coudé" reflector on an asymmetric German equatorial mount. The optical specifications are as follows: D=600.075mm, F=9360mm, f/15.6, as measured after the recent refurbishment in 2009. The image scale is 22.04 arcsec/mm at its Cassegrain focus. The 24-in telescope was built as the centerpiece of the observatory in 1971. In its Cassegrain configuration it's been the telescope most used for research at Wallace and several papers and theses have been published using data obtained with it. The mirror was recoated in 2009 and the control system was redone in 2013 by Tim Brothers and Dan Gray of Sidereal Technology ("SiTech"). |
|---|---|
| Mount | Ealing Corporation |
| Pointing Accuracy | 1.9 arcminutes RMS |
| Max exposure | Unguided 120s - Guided 2-10min |
| Telescope | Ealing 24-inch Cassegrain |
| Diameter of primary | D=600.075mm |
| Focal length - f/# | F=9360mm, f/15.6 |
| Instrument Port #1 | Eyepiece: 23mm - 40mm |
| Instrument Port #2 | |
| Instrument Port #3; | SBIG STL-1001e with Clear, BVRI filters |
| Instrument Port #4 | |
| Autoguider | Yes, External |
| There are four 14-inch telescopes (Celestron C-14's of both the 1970's "orange tube" variety and 2 new EdgeHD versions) in the Shed. One is mounted on a new equatorial mount, the other three are mounted on German equatorial mounts. All four have idential detectors and mostly identical filter sets. The roll-off roof building, affectionately refered to as "the Shed," was built in 1984. The "orange tube" C-14's were refurbished in ~2016 and still produce excellent images and science data. The most recent upgrade is a new refractor mounted to Pier 1. This will provide a new capability at Wallace for super wide field imaging. This 90mm Astro-Tech refractor has two focal length settings depending on whether the observer utilizes the focal reducer. It also features numerous filter options, including LRGB (for true color astrophotography), Sloan ugriz filters (for photometry) and H-alpha, Sulfur II and Oxygen III (for narrowband imaging). |
| Pier 1 | Pier 1 refractor | Pier 2 | Pier 3 | Pier 4 | |
|---|---|---|---|---|---|
| Mount | Planewave L-350 | Planewave L-350 | Software Bisque Paramount ME | Software Bisque Paramount ME with MKS5000 Upgrade | Software Bisque Paramount MEII |
| Telescope | Celestron C-14 Edge HD | Astro-Tech 90mm Carbon Fiber Tube | Celestron C-14 Edge HD | Celestron C-14 "orange tube" | Celestron C-14 "orange tube" |
| Focal length - f/# | F=~3910mm - f/11 | F=530mm f/6 or F=432 f/4.8 |
F=~3910mm - f/11 | F=~3910mm - f/11 | F=~3910mm - f/11 |
| Plate Scale | 1.272"/px | 1.43"/px or 1.792"/px | 1.208"/px | 1.189"/px | 1.252"/px |
| Camera | FLI ML1001 CCD | QHY533m CMOS | SBIG STL-1001e CCD | FLI ML1001 CCD | SBIG STL-1001e CCD |
| Camera info | 1024x1024 pixels @24um | 3008x3008 @3.76um | 1024x1024 pixels @24um | 1024x1024 pixels @24um | 1024x1024 pixels @24um |
| Filter set | Clear, u', g', r', i', z', R | Sloan u', g', r', i', z' set. Also available: H-alpha, OIII and SII and LRGB set; | ND 1.6 (2.5%T) for lunar observations, u', g', r', i', z', Clear, R | Clear, u', g', r', i', z', R | Open, u', g', r', i', z', Clear, R |
| Autoguider | soon! | soon! | No | Yes, off-axis (offline) | No |